D. G. Ripley, "DVI-a Digital Multimedia Technology", Communications of the ACM . 32(7): 811-822, 1989.  Home/Search   Document Not in Database   Summary   ACM   TOC   Related Articles   Check

....the JPEG chip. The CCITT s p x 64 standard [3] is a predictive discrete cosine transform coder. CD I [18] is a standard for recording interactive video and audio on compact disks. CD I can only display full motion video at less than full screen resolu tions. DVI (digital video interactive) [19] is a proprietary scheme for compressing video for playback from a storage medium. It is designed to require much more work to compress than to uncompress, and so is unsuitable for real time transmission of video. It can be stored on any digital storage medium, though CD ROM is a particularly ....

G. David Ripley. DVI--a digital multimedia technology. Communications of the AUM, 32(7):811-822, July 1989.

....data from a real environment, rendering overhead is minimized but data acquisition becomes increasingly important. One of the earliest examples of this technology was the branching movie: contiguous film clips that can be played in di#erent orderings to provide a usercontrolled walk through [1] [2]. The type of image based VR interface we employ in the work described here allows a user to view the scene from a fixed viewpoint, and to jump between pre computed viewing locations. Although the observer motion is currently constrained, image based VR permits extremely realistic scenes to be ....

D. G. Ripley, "Dvi - a digital multimedia technology," Communications of the ACM, vol. 32, no. 7, pp. 811--822, 1989.

....element ( of this type. 2 Example 3: Protocols for the storage of moving pictures support different levels of audio and video quality. For instance, the proposed MPEG [18] standard is inherently scalable in terms of megabits per second of motion video and audio, within certain ranges. The DVI [19] standard defines two motion video quality and several different audio qualities. p Theta64 [20] is an inherently scalable motion video protocol used for teleconferencing with limited bandwidth. A multiresolution motion video audio type based on a scalable protocol can be constructed ....

G. David Ripley. DVI--a digital multimedia technology. Communications of the ACM, 32(7):811--822, July 1989.

....Data Stream A B C Figure 4.3: Embedded Stream Markers. An example is the interleaved underlay stream of the DVI system [Luther89] which contains data to be delivered to the application in synchronisation with stream pre62 sentation. This is in addition to DVI support for embedded time stamps [Ripley89] and an application supplied hook routine which, if installed, is invoked by the support system for each frame of video which is processed. Time 1 2 3 4 5 Data Stream Synchronisation Stream A B C Figure 4.4: Markers in a Synchronisation Stream. The use of such a variety of techniques for ....

G. D. Ripley. DVI - A Digital Multimedia Technology. Communications of the ACM, 32(7):811--822, July 1989. (p 63)

....Interactive (DVI) As mentioned earlier, the Digital Video Interactive (DVI) encoding from Intel and IBM is of particular interest in this work because the conferencing systems used for the experiments in the later chapters use DVI technology. DVI is a combined hardware and software solution [44, 93]. The Intel IBM ActionMedia I and ActionMedia II controllers provide most of the media stream processing directly on the controller using a set of proprietary algorithms. The original version of the DVI hardware and software had limited flexibility and was intended to function much like a digital ....

Ripley, G. D., DVI - A Digital Multimedia Technology, Communications of the ACM, v. 32, no. 7, July, 1989, p. 811-822. 370

.... Tactus: Toolkit Level Support for Synchronized Interactive Multimedia, Multimedia Systems 1(2) 1993, pp 77 86. 2 1. Introduction Recently, many proposals have emerged for extending graphics systems to support multimedia applications with sound, animation, and video [Wayner 91, Yager 92, Ripley 89, Xmedia 92] Other research has been directed toward real time transmission of multimedia data over networks [Little 91, Anderson 91, Rowe 92] and standards for the representation and exchange of multimedia data [Newcomb 91] New capabilities for real time interactive multimedia interfaces ....

G. D. Ripley. DVI - A Digital Multimedia Technology. CACM 32(7):811-822, July, 1989.

....streets of the city of Aspen were filmed at 10 foot intervals. At playback time, two videodisc players were used to retrieve corresponding views to simulate the effects of walking on the streets. The use of digital videos for exploration was introduced with the Digital Video Interactive technology [2]. The DVI demonstration allowed a user to wander around the Mayan ruins of Palenque using digital video playback from an optical disk. A Virtual Museum based on computer rendered images and CD ROM was described in [3] In this example, at selected points in the museum, a 360 degree panning movie ....

Ripley, D. G. DVI--a Digital Multimedia Technology. 9 Communications oftheACM. 32(7):811-822. 1989.

....of data compression standards. The following lists some of the more widely used representations that have recently emerged from these groups. Space does not permit detailed descriptions, for more information the reader can consult the indicated references. Digital Video Interactive or DVI [17] refers to a hardware software environment now licensed by Intel and intended mainly for PCs. DVI is based on two digital video formats: Production Level Video (PLV) and Real Time Video (RTV) PLV uses a proprietary compression algorithm allowing VHS quality video to be produced from a data rate ....

Ripley, G.D. DVI -- A Digital Multimedia Technology. Commun. of the ACM,Vol. 32, No. 7 (July 1989), pp. 811-822.

....allows two or more video streams to be spatially composed. Both capabilities are now becoming available to user interface designers. KEYWORDS: digital video, video layering, video widgets, media components INTRODUCTION Recent developments in low data rate digital video formats, such as DVI [10], QuickTime [5] MPEG [8] and JPEG [11] are creating new possibilities for user interface design. Unfortunately, many applications treat video simply as something which can be played in a window. This view reduces interactivity to choosing when and where to start and stop the video, and ignores ....

....videos have been produced to help visualize such interfaces (e.g. Knowledge Navigator [6] and systems containing guides or agents have appeared. An early example is Palenque, a DVI title where a video guide assists the user in exploring a tropical rain forest (a description can be found in [10]) A second example is the use of guides to help users navigate a hypermedia database [3] 9] Both graphics based (computer generated) and videobased guides were developed; this work also experimented with attributing character to the guides so they not only assist in navigation but also supply a ....

Ripley, G.D. DVI -- A Digital Multimedia Technology. Commun. of the ACM, Vol. 32, No. 7 (July 1989), 811822.

....new applications of computers. For example, a collaborative work system can include video conferencing windows, or a hypermedia training system can include audio and video instructional material. While most research on multimedia applications has focused on compression standards ( 3] 9] 10] [14]) synchronization issues ( 11] 12] storage representations ( 12] software architectures ( 2] 8] 11] and application design ( 13] 15] 16] little work has been reported on techniques for manipulating digital video data in real time, such as implementing special effects and image ....

David Ripley, DVI -- Digital Multimedia Technology, Communications of the ACM, Volume 32, No 7, pp 811-822, July 1989

....video windows. Audio control functionality like talker indication or on screen VU display cannot be readily supported. While this architecture imposes some mild control timing constraints on the operating system, it is not likely to require fundamental changes. The Etherphone [8] VOX [9] DVI [10] and IMAL [11] systems are examples of the separation of control and data for audio. Instead of analog mixing, the Pandora system [12] integrated video in digital form, but through a separate video processor and a pixel switch that decided for each pixel whether to display the workstation graphics ....

G. D. Ripley, "DVI -- a digital multimedia technology," Communications ACM, vol. 32, pp. 811--822, July 1989.

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D. G. Ripley, "DVI-a Digital Multimedia Technology", Communications of the ACM . 32(7): 811-822, 1989.

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David Ripley, "DVI --- Digital Multimedia Technology", Communications of the ACM, Vol. 32, No. 7, pp. 811-822, July 1989.

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Ripley, G.D. (1989). DVI - a digital multimedia technology. Comm. of the ACM, 32(7), 811-822.

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Ripley D.G., DVI - A Digital Multimedia Technology, Communications of the ACM, 32(7), pp. 811-822, 1989.

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Ripley D.G., DVI - A Digital Multimedia Technology, Communications of the ACM, 32(7), pp. 811822, 1989.

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Ripley, G.D. (1989). DVI - A Digital Multimedia Technology, CACM, Vol. 32, No. 7, pp. 811822.

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Ripl89a Ripley, G.D., "DVI - A Digital Multimedia Technology," Communications of the ACM, vol. 32, no. 7, July 1989, pp. 811-822.

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